package com.itheima.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.common.R;
import com.itheima.entity.Employee;
import com.itheima.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {

    @Autowired
    private EmployeeService employeeService;

    /*
        员工登录
     */
    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee) {
        //1.将页面提交的密码password进行md5加密处理
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        //2.根据页面提交的用户名username查询数据库，是否存在该用户
        LambdaQueryWrapper<Employee> lqw = new LambdaQueryWrapper<>();
        lqw.eq(employee.getUsername()!=null,Employee::getUsername, employee.getUsername());
        Employee emp = employeeService.getOne(lqw);

        //3.如果没有查询到则返回登陆失败的结果
        if (emp == null) {
            return R.error("该用户不存在");
        }

        //4.密码比对，如果不一致，则返回登陆失败的结果
        if (!emp.getPassword().equals(password)) {
            return R.error("密码错误，登陆失败");
        }

        //5.查看员工状态，如果为以禁用状态，则返回员工已禁用结果
        if (emp.getStatus() == 0) {
            return R.error("员工账号被禁用");
        }

        //6.登录成功，将员工id存入Session并返回登录成功结果
        request.getSession().setAttribute("employee", emp.getId());
        return R.success(emp);

    }


    /*
     *   退出登录界面
     * */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request) {
        //清理Session中保存当前登录员工的id
        request.getSession().removeAttribute("employee");
        return R.success("退出成功");
    }

    /*
     * 新增员工
     * */
    @PostMapping
    public R<String> save(HttpServletRequest request, @RequestBody Employee employee) {
        log.info("新增员工，员工信息：{}", employee.toString());

        //设置初始密码为123456，并进行md5加密处理。
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));

        /*
        * 使用MyBatisPlus提供的公共字段自动填充功能
        * */
        /*employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());

        //获取当前用户的id
        Long empId = (Long) request.getSession().getAttribute("employee");
        employee.setCreateUser(empId);
        employee.setUpdateUser(empId);*/

        employeeService.save(employee);
        return R.success("新增员工成功");
    }

    /*
     * 分页查询
     * 传过来的参数是普通参数，不需要加注解@RequestBody
     * */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {
        //记录日志，测试方法是否有用
        log.info("page={},pageSize={},name={}", page, pageSize, name);

        //创建分页构造器
        Page<Employee> pageinfo = new Page(page, pageSize);

        //创建条件构造器
        LambdaQueryWrapper<Employee> lqw = new LambdaQueryWrapper<>();

        //添加过滤条件
        //lqw.like(name!=null,Employee::getName,name);
        lqw.like(StringUtils.isNotEmpty(name),Employee::getName,name);

        //添加排序条件
        lqw.orderByDesc(Employee::getUpdateTime);

        //执行分页查询操作
        employeeService.page(pageinfo,lqw);

        //返回结果
        return R.success(pageinfo);

    }

    /*
    * 修改员工信息
    * */

    @PutMapping
    public R<String> update(HttpServletRequest request,@RequestBody Employee employee) {
        log.info("employee:{}",employee);

        long id = Thread.currentThread().getId();
        log.info("当前线程：{}",id);
        //获得当前登录用户的id
        /*Long empId = (Long) request.getSession().getAttribute("employee");
        employee.setUpdateUser(empId);
        employee.setUpdateTime(LocalDateTime.now());*/

        employeeService.updateById(employee);
        return R.success("修改成功");

    }

    /*
    * 根据id查询员工信息
    * */
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id) {
        log.info("根据id查询员工信息");

        Employee employee = employeeService.getById(id);
        if (employee!=null){
            return R.success(employee);
        }

        return R.error("没有查询到对应的员工信息");
    }

}
